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A kind of method for extracting titanium from ilmenite leaching slag

A technology of ilmenite and leaching slag, which is applied to chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of ineffective removal of impurity carbon, difficult recycling, waste of resources, etc., and achieves high recovery rate, The effect of low cost of titanium extraction and low dosage of medicine

Active Publication Date: 2018-11-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, due to the special properties of titanium, a large amount of ilmenite ore has been developed and utilized. Since no feasible comprehensive utilization method has been found, a large amount of ilmenite slag has accumulated, which has accumulated to 80 million tons so far, and is still It increases at a rate of 3 million tons per year. If it is directly discharged into the tailings pond, it will cause waste of resources and pollute the environment. At present, the recovery methods of ilmenite are mainly flotation and acid leaching. The ferro-titanium produced by acid leaching Ore leaching slag generally also contains a part of available titanium and contains a large amount of industrial waste acid and residual impurity carbon after calcination, most of which are difficult to recycle, and the conventional flotation method currently used to recover ilmenite leaching slag for carbon removal is not effective Remove the impurity carbon in it, so it is difficult to recycle the ilmenite leaching residue

Method used

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  • A kind of method for extracting titanium from ilmenite leaching slag
  • A kind of method for extracting titanium from ilmenite leaching slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of ilmenite leaching slag described in the present embodiment extracts the method for titanium, such as figure 1 As shown, the specific steps are as follows:

[0018] (1) Weigh 500g of the ilmenite leaching slag treated with hydrochloric acid for pretreatment, add CaO and water to the leaching slag, stir well, neutralize the HCl in it, adjust the pH value of the system to 7, detect the supernatant of the system CaCl 2 concentration, adding CaCl 2 Adjust the system supernatant to saturated CaCl 2 Solution, checked, saturated CaCl at room temperature 2 The specific gravity of the solution is about 1.43, and the specific gravity of carbon in the leaching residue is less than that of saturated CaCl 2 The solution is about 1.1, obviously carbon is saturated in CaCl 2 The middle will float up, and the system will form layers;

[0019] (2) Add the pretreated leaching slag system obtained in step (1) into a 1.5L flotation tank, and stir with a 1.5L inflatable stirr...

Embodiment 2

[0025] A kind of ilmenite leaching slag described in the present embodiment carries the method for titanium, and concrete steps are as follows:

[0026] 1) Weigh 500g of the ilmenite leaching slag treated with hydrochloric acid for pretreatment, add CaO and water to the leaching slag, stir well, neutralize the HCl in it, adjust the pH value of the system to 7, and detect the concentration in the supernatant of the system CaCl 2 concentration, adding CaCl 2 Adjust the system supernatant to saturated CaCl 2 Solution, checked, saturated CaCl at room temperature 2 The specific gravity of the solution is about 1.43, and the specific gravity of carbon in the leaching residue is less than that of saturated CaCl 2 The solution is about 1.1, obviously carbon is saturated in CaCl 2 The middle will float up, and the system will form layers;

[0027] (2) Add the pretreated leaching slag system obtained in step (1) into a 1.5L flotation tank, and stir with a 1.5L inflatable stirring f...

Embodiment 3

[0033] A kind of ilmenite leaching slag described in the present embodiment carries the method for titanium, and concrete steps are as follows:

[0034] 1) The leaching slag of ilmenite treated with hydrochloric acid is pretreated, CaO and water are added to the leaching slag, fully stirred, the HCl in it is neutralized, the pH value of the system is adjusted to 7, and the CaCl in the supernatant of the system is detected 2 concentration, adding CaCl 2 Adjust the system supernatant to saturated CaCl 2 Solution, checked, saturated CaCl at room temperature 2 The specific gravity of the solution is about 1.43, and the specific gravity of carbon in the leaching residue is less than that of saturated CaCl 2 The solution is about 1.1, obviously carbon is saturated in CaCl 2 The middle will float up, and the system will form layers;

[0035] (2) Add the pretreated leaching slag system obtained in step (1) into the flotation tank, and stir with an inflatable stirring flotation mac...

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Abstract

The invention discloses a method for extracting titanium from leaching residues of ilmenite. The leaching residues contain a large quantity of carbon elements and residual waste acid, a main component of the waste acid is HCl, CaO and water are added firstly, HCl in the leaching residues is neutralized, a system is adjusted to become a saturated solution system of CaCl2, supernatants of the leaching residues have different densities, carbon can float upwards and be layered in the system, a heavy-liquid reverse flotation system is formed, then the pretreated leaching residues are treated with a reverse-flotation carbon removal technology, rough flotation is performed three times, concentration is performed once, titanium concentrate quality improving operation refers to primary table open concentration, and carbon minerals with the grade being 35% or above and the recovery rate being 90% or above and titanium concentrate with the grade being 39% or above and the recovery rate being 70% or above can be obtained.

Description

technical field [0001] The invention relates to a method for extracting titanium from ilmenite leaching slag, which belongs to the technical field of ore dressing. Background technique [0002] Theoretical content of TiO in ilmenite 2 The content of ilmenite is 52.63%. In nature, ilmenite is divided into two categories: rock ore and placer. The grade of titanium concentrate selected from rock ore is generally 42%~48%, while the grade of iron ore selected from placer The concentrate grade is generally 50% to 64%. [0003] The main utilization of ilmenite is to use electric furnace smelting to produce acid-soluble high-titanium slag, which is then used in the production of titanium dioxide by sulfuric acid process. More than half of the sulfuric acid titanium dioxide plants in foreign countries use acid-soluble high-titanium slag as raw materials. Compared with directly using ilmenite concentrate, although some costs are increased, the consumption of concentrated sulfuric a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03B9/06B03B1/04
CPCB03B1/04B03B7/00B03B9/06
Inventor 谢贤宋强童雄马原琳杨子轩时盛春杨波黎继永韩彬
Owner KUNMING UNIV OF SCI & TECH